简介：Onthebasisofthermalradiationfromsolidsurfacetomeaseuretem-perature,anewtwo-coloropticalfiberpyrometerisputforward.ItgetstwothermalradiationsignalsbythemethodofY-typeopticalfiberandnarrowbandfilterforindi-cationofthetemperature,SidiodeinusedforphotoelectricmeasurementandMCS-51single-chipmicrocomputerforsamplingandhandling.Thesystemcanoutputindigitalandcanprintoutinstantaneousvalue,peakvalueandvalley,Ithasmanyadvan-tagessuchasquickmeasurement,smallobjective,highprecision,highsensitivityandnon-emissivitycompensation.inaddition,thespecialcircuitofthispyrometerandthees-tablishmentofmathematicsmodelarediscussed.

简介：Twotypesofnewsubliminalchannelsareconstructedrespectivelybasedonprovablesecurepublickeycryptosystemsandidentityrecognitioninsomenetworkapplications.Researchshowsthattherearesomenewcharacteristicswhichareinfavorofcovertcommunicationinourconstructions.Itishardtomakethesubliminalchannelsfree,andthechannelshavelargecapacityandhightransmissionefficiency.Wealsopointoutthatthehardnesstomakethechannelsfreeisdisadvantageoustothewardenwhotriestothwartthecovertcommunication.

简介：Ｔｗｏ－ｃｏｌｏｒＯｐｔｉｃａｌＦｉｂｅｒＰｙｒｏｍｅｔｅｒ①ＷＡＮＧＬｉｔｉａｎ，ＳＨＡＮＧＬｉｐｉｎｇ（ＹａｎｓｈａｎＵｎｉｖｅｒｓｉｔｙ，Ｑｉｎｈｕａｎｇｄａｏ０６６００４，ＣＨＮ）Ａｂｓｔｒａｃｔ：Ｏｎｔｈｅｂａｓｉｓｏｆｔｈｅｒｍａｌｒａｄ...

简介：Anoveltwo-wayrotaryjoint(SandPband)isdescribed.ForSbandrotaryjoint,VSWRislessthan1.2overthefrequencyrangefrom1.2GHzto4.4GHz.ForPbandrotaryjoint,thestructureofthereentrantresonatorisusedtoreducethelengthoftherotaryjointtoaboutλ/4,andthespecialandsmallsizerequirementissatisfied.

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简介：Atechnologyforcombiningdigitalwatermarkswithtwo-colorbitmapimageonthethresholdwatermarkingmethodispresented.Ourtechnologydoesn'taddanythingtothedigitalmedia,butcombinesthewatermarksintwo-colorbitmapimagebylookingforsomecharacteristicvaluesinthebitmapandusestherelationshipbetweenthewatermarksandthecharacteristicvaluestoprovethecopyrightprotection.Thechoiceofthecharacteristicvaluesdependsonthechoiceofacryptographickeyknownbytheownerofthebitmap.Thebenefitofusingacryptographickeyistocomginethewatermarkswiththebitmapinahighsecureway.

简介：Anewclassofmultilength,constant-weightandtwo-dimensionalmultiwavelengthopticalorthogonalcode(2DMWOOCs)withlargecapacityandgoodcorrelationpropertiesisconstructedbasedonmultilengthone-dimensional(1D)OOCs.TheperformanceofthesenewMWOOCsinanOCDMAnetworkwithdouble-servicesisanalyzed.Theresultshowsthatmediawiththeshortercodewordperformsmuchbetterthanthemediawithlongercodeword,andOCDMAsystemwiththesenewmultilengthMWOOCsperformswell.ThesefeaturesallowmultimediatransmissionoflargecapacityinOCDMAsystem.

简介：AlthoughHamilton'squaternionhasbeenintroducedsuccessfullyinestimatingfrequenciesoftwodimensionalharmonics,itwasdifficulttouseittoestimatefrequenciesoftwodimensionalharmonicsinadditivenoisebecausethemultiplicativerulesofHamilton'squaternionwerenotcommutative.Inthispaper,wepresentedanewideatosolvethisproblemandappliedittoarraysignalprocessing.First,wepresentedanotherdefinitionofoperationrulesofquaternion,whosemultiplicativeruleswerecommutative.Second,weappliedthisdefinitiontoconstructcorrelationmatrixofhypercomplexsignalmodelbasedonquaternionsoastorestrainadditivenoise.Finally,wegottheisomorphiccomplexmatrixofcorrelationmatrixofhypercomplexsignalmodeltoestimatefrequencies.Somesimulationsillustratedournewidea.

简介：ByuseoftheKeldyshnn-equilibriumGreen's-functionmethods,thethirdharmonicsusceptibilitiesoftwopolyanilinefamilies,PANI-HCl巨PANI－H3PO4，arccalculated[x^(3)(ω）≈10^-12esu].Itwasfoundthatthethirdharmonicsusceptibilityofpolyanilinestronglydependsonthedelocalizationoftheelectrons.Therefractiveindicesn(λ=589nm)ofPANI-HClandPANI-H3PO4arecalculatedbyuseofthreecommonmethods(theLorentz-Lorentztheoreticalmodel,theGladstone-DalegroupcontributionandtheVogelgroupcorrelation)basedongroupcontributionstomolarrefraction.Thecalculatenvaluesarevariedfrom1.31to1.42forPANI-HCland1.36to1.45forPANI-H3PO4.

简介：波长demultiplexer基于二维的photonic水晶波导被建议。由使用域(FDTD)方法和飞机挥动扩展(PWE)方法的有限差别时间，传播系列和模式地的分布被获得，并且波长demultiplexer被综合了。设备的特征被获得。

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简介：ＴｈｅＥｑｕｉｖａｌｅｎｔＰａｒａｍｅｔｅｒｓｏｆａｎＩｎｃｌｉｎｅｄＳｌｏｔｉｎＴｗｏＣｒｏｓｓｅｄＷａｖｅｇｕｉｄｅｓｗｉｔｈＲａｄｉａｔｉｎｇＳｌｏｔｓ￥ＬｕｅＳｈａｎｗｅｉ＆ＴａｎｇＨｏｎｇｚｈｅｎ（ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＡｅ...

简介：线性系统的一个反复的答案被学习，它从天线由混合有限元素的方法和时刻的方法与绝缘的目标依附的一根电线的discretization产生(混合女性妈妈).It是有效的由混血儿为如此的电磁的问题建模女性妈妈，因为它两个都拿优点女性的并且妈妈的ability.But结果的线性系统是复杂的，并且它是难的被Krylovsubspace方法独自解决，一种二水平的preconditioning技术将因此是

简介：Howtoimprovetheprobabilityofregistrationandprecisionoflocalizationisahardproblem,whichisdesideratedtosolve.Thetwobasicapproaches(normalizedcross-correlationandphasecorrelation)forimageregistrationareanalysed,twoimprovedapproachesbasedonspatial-temporalrelationshiparepresented.Thismethodaddsthecorrelationmatrixaccordingtothedisplacementsinx-cirectionandy-directions,andtheregistrationposeissearchedintheaddedmatrix.Themethodovercomestheshortcomingthattheprobabilityofregistrationdecreasingwithareaincreasingowingtogeometricdistortion,improvestheprobabilityandtherobustnessofregistration.

简介：Inthispaper,theerenkovradiationoflightpulseinamicroringandgratingsissimulatedandinvestigated.Thesystemdesignconsistsofatwo-defectgratingincorporatingamicroring,connectedwithauniformgrating.Insimulation,thecontinuouswave(CW)lightpulsewithwavelengthcenteredat1.55μmisinputintothemicroringdeviceviathetwo-defectgrating.Theresonantoutputsfromthetwo-defectgratingpropagatethroughthemicroringanduniformgrating,wherethetimedelaysofthosetwoinputpulseswithdifferentwavelengthsthroughthesystemaredistinguishedbytheoutputuniformgrating.Fromtheobtainedresonantoutputpulses,wefindthatthered-shiftedandblue-shiftederenkovpulsesareobserved.Inapplications,suchaproposedsystemcanbeusedtoformtwodifferentopticaldelaypulses,inwhichthechangeinerenkovradiationofthem,i.e.,timedelaywithinamicroringdevicesystem,canbeusefulforerenkovradiationimagingandsensingapplications.

简介：Theintensityandphaseformulasthatarevalidforthesaturationandinter-mediateregime(beforesaturation)arederived,andtheanalyticalexpressionswiththerationofsaturationintensitytototalincidentintensityastheirexplicitvariableareobtanied.Theintensitydepenenceofstationaryenergytransferinphotorefractiveacodirectionaltwo-wavemixingisexamined.Itisnecessarytousingtheseformulasinsomeproblems,suchasthetemperatureofintensitydependenceoftwo-wavemixing.Amethodofmeasuringexponen-tialgaincoefficientispresented,whichissuitablefortwo-wavemixinginintermediateregime.

简介：Aimingatthedefectsofthenodesinthelowenergyadaptiveclusteringhierarchy(LEACH)protocol,suchashighenergyconsumptionandunevenenergyconsumption,atwo-levellinearclusteringprotocolisbuilt.Theprotocolimprovesthewayofthenodesdistributionatrandom.Theterminalnodeswhichhavenotbeenatwo-levelclusterheadintheclustercancompetewiththeprincipleofequivalentpossibility,andonthebasisoftherestenergyofnodesthetwo-levelclusterheadisselectedatlast.Thesinglehopwithintheclusterandsinglehopormultiplehopsbetweenclustersareused.Simulationexperimentresultsshowthattheperformanceofthetwo-levellinearclusteringprotocolappliedtotheHexicorridoragriculturalfieldissuperiortothatoftheLEACHprotocolinthesurvivaltimeofnetworknodes,theratioofsuccess,andtheremainingenergyofnetworknodes.

简介：通过实验设计和理论分析，三种技术使用了性质描绘二光子的吸收(TPA)，例如非线性的传播实验和理论，Z扫描技术和二光子的导致的荧光方法，被介绍。是utilizable的三个实验的性质并且在理想的限制下面可实现简单地被分析。为TPA描述的大小的优点也被分析。

简介：A4.1GHztwo-stagecascodeLow-NoiseAmplifier(LNA)withElectro-StaticDischarge(ESD)protectionispresentedinthispaper.TheLNAhasbeenoptimizedusingESDandLNAco-designmethodologytoachieveagoodperformance.Post-layoutsimulationresultsexhibitaforwardgain(S21)ofabout21dB,areverseisolation(S12)oflessthan-18dB,aninputreturnloss(S11)oflessthan-16dB,andanoutputreturnloss(S22)oflessthan-17dB.Moreover,theNoiseFigure(NF)is2.6dB.ThisdesignisimplementedinTSMC0.18μmRFCMOStechnologyandthedieareais0.9mm×0.9mm.

简介：Anewgratingstructurewithcladdingetchedasthesinusoidalfunctionalongthelengthdirectionisintroduced.Thecladdingareaofthegratingvariesasthesinusoidalfunctionalongfiberaxes.Thecoupledmodetheoryisusedtoanalyzeitsperformance.Comparedwiththelinearlychirpedgrating,thenewstructureexhibitsanidealboxspectrumwithsteepedgeswhenthetensionisappliedonthegratingsintwodifferentways.ForthetypeBgrating,withouttensionafterwriting,ithasabiggerbandwidthutilization(BWU)thanthatofthetypeAgratingwithtensionafterwriting.ComparedwiththetypeAgrating,thetypeBoneismoreadaptableinfiber-opticcommunicationsandsensorsystems.